Expandable impeller pump

Patent metadata

Field	Value
Publication number	US-10865801-B2
Application number	US-201916254184-A
Country	US
Kind code	B2
Filing date	Jan 22, 2019
Priority date	Sep 17, 2004
Publication date	Dec 15, 2020
Grant date	Dec 15, 2020

Abstract

An impeller includes a hub, and a plurality of blades supported by the hub, the blades being arranged in at least two blade rows. The impeller has a deployed configuration in which the blades extend away from the hub, and a stored configuration in which at least one of the blades is radially compressed, for example by folding the blade towards the hub. The impeller may also have an operational configuration in which at least some of the blades are deformed from the deployed configuration upon rotation of the impeller when in the deployed configuration. The outer edge of one or more blades may have a winglet, and the base of the blades may have an associated indentation to facilitate folding of the blades.

First claim

The invention claimed is:

1. A catheter heart pump comprising:
an elongate catheter body having a proximal end, and a distal end configured to be advanced to a heart of a patient;
an expandable sleeve coupled to the distal end, the expandable sleeve having a stored configuration in which the expandable sleeve is advanced to the heart, and an expanded configuration, and further comprising a distal inlet port and a proximal outlet port, wherein the expandable sleeve comprises a proximal portion coupled to the distal end of the elongate catheter body and proximal of the proximal outlet port, the proximal portion configured to be non-expandable; and
an expandable impeller configured to be disposed within the expandable sleeve between the distal inlet port and the proximal outlet port when in the expanded configuration, and configured to turn on a shaft to generate a fluid flow from the distal inlet port to the proximal outlet port.

2. The catheter heart pump of claim 1 , wherein the stored configuration of the expandable sleeve has a diameter of no more than 4 millimeters, and the expanded configuration has a diameter of at least 6 millimeters.

3. The catheter heart pump of claim 1 , wherein the expandable impeller comprises a hub and a plurality of continuous helical blades extending therefrom.

4. The catheter heart pump of claim 1 further comprising a storage sleeve into which the expandable sleeve is configured to be inserted, the storage sleeve configured to compress the expandable sleeve into the stored configuration for insertion into the patient and advancement to the heart.

5. The catheter heart pump of claim 4 , wherein the storage sleeve is configured to translate proximally relative to the expandable sleeve such that the expandable sleeve exits the storage sleeve and expands to the expanded configuration.

6. The catheter heart pump of claim 1 further comprising a guidewire extending through the elongate catheter body.

7. The catheter heart pump of claim 1 , wherein the expandable sleeve comprises a flexible mesh having an elastic coating.

8. The catheter heart pump of claim 7 , wherein the distal inlet port is further defined by the flexible mesh and elastic coating.

9. The catheter heart pump of claim 1 , wherein the expandable impeller is configured to generate a fluid flow of up to four liters per minute.

10. The catheter heart pump of claim 1 , wherein the expandable impeller is configured to turn on the shaft at a speed of up to 30,000 rotations per minute.

11. The catheter heart pump of claim 1 further comprising a plurality of vanes disposed within the expandable sleeve and configured to reduce swirl velocity of the fluid flow.

12. The catheter heart pump of claim 1 further comprising an electric motor disposed at the proximal end of the elongate catheter body and coupled to the shaft extending through the elongate catheter body to the distal end, the electric motor configured to turn the shaft an the expandable impeller.

13. The catheter heart pump of claim 1 , wherein the expandable impeller comprises a hub and a plurality of impeller blades, the expandable impeller formed as a unitary structure from a polymer material.

14. The catheter heart pump of claim 13 , wherein the expandable impeller is configured to be compressed when the expandable sleeve is in the stored configuration.

15. The catheter heart pump of claim 14 , wherein the plurality of blades are configured to fold onto the hub when the expandable impeller is compressed.

16. The catheter heart pump of claim 1 , wherein the expandable impeller is configured to be drawn proximally into the proximal portion of the expandable sleeve to compress the expandable impeller into the stored configuration.

17. The catheter heart pump of claim 1 further comprising a storage sleeve into which the expandable impeller is configured to be inserted, the storage sleeve configured to compress the expandable impeller into the stored configuration for insertion into the patient and advancement to the heart.

18. The catheter heart pump of claim 17 , wherein the storage sleeve is configured to translate proximally relative to the expandable impeller such that the expandable impeller exits the storage sleeve and expands to the expanded configuration.

19. The catheter heart pump of claim 18 , wherein the storage sleeve is disposed within the expandable sleeve.

20. A catheter heart pump comprising:
an elongate catheter body having a proximal end, and a distal end configured to be advanced to a heart of a patient;
an expandable sleeve coupled to the distal end, the expandable sleeve having a stored configuration in which the expandable sleeve is advanced to the heart, and an expanded configuration, and further comprising a distal inlet port and a proximal outlet port;
an expandable impeller configured to be disposed within the expandable sleeve between the distal inlet port and the proximal outlet port when in the expanded configuration, and configured to turn on a shaft to generate a fluid flow from the distal inlet port to the proximal outlet port, and
a storage sleeve into which the expandable sleeve is configured to be inserted, the storage sleeve configured to compress the expandable sleeve into the stored configuration for insertion into the patient and advancement to the heart, wherein the storage sleeve is configured to translate proximally relative to the expandable sleeve such that the expandable sleeve exits the storage sleeve and expands to the expanded configuration.

21. A catheter heart pump comprising:
an elongate catheter body having a proximal end, and a distal end configured to be advanced to a heart of a patient;
an expandable sleeve coupled to the distal end, the expandable sleeve having a stored configuration in which the expandable sleeve is advanced to the heart, and an expanded configuration, and further comprising a distal inlet port and a proximal outlet port;
an expandable impeller configured to be disposed within the expandable sleeve between the distal inlet port and the proximal outlet port when in the expanded configuration, and configured to turn on a shaft to generate a fluid flow from the distal inlet port to the proximal outlet port, and
a storage sleeve into which the expandable impeller is configured to be inserted, the storage sleeve configured to compress the expandable impeller into the stored configuration for insertion into the patient and advancement to the heart, wherein the storage sleeve is configured to translate proximally relative to the expandable impeller such that the expandable impeller exits the storage sleeve and expands to the expanded configuration.

Assignees

• Tc1 Llc
• Penn State Res Found

Inventors

• Mcbride Mark W
• Mallison Thomas M
• Dillon Gregory P
• Campbell Robert L
• Boger David A
• Hambric Stephen A
• Kunz Robert F
• Runt James P
• Walsh Justin M
• Leschinsky Boris

Classifications

• A61M60/135

  inside a blood vessel, e.g. using grafting · CPC title

• A61M60/808

  specially adapted for deformable impellers, e.g. expandable impellers · CPC title

• A61M60/237

  the blood flow through the rotating member having mainly axial components, e.g. axial flow pumps · CPC title

• A61M60/414

  transmitted by a rotating cable, e.g. for blood pumps mounted on a catheter · CPC title

• F03G7/0614

  using shape memory elements · CPC title